@arjanfrans/spritesheet-generator

Spritesheet.js is command-line spritesheet (a.k.a. Texture Atlas) generator written in node.js.

###Supported spritesheet formats###

• Starling / Sparrow
• JSON (i.e. PIXI.js)
• Easel.js
• cocos2d
• CSS (new!)

###Usage###

1. Command Line

   $ spritesheet-js assets/*.png

   Options:

   $ spritesheet-js
   Usage: spritesheet-js [options] <files>
   
   Options:
   -f, --format  format of spritesheet (starling, sparrow, json, pixi.js, easel.js, cocos2d)                                                      [default: "json"]
   -n, --name    name of generated spritesheet                                                                                                    [default: "spritesheet"]
   -p, --path    path to export directory                                                                                                         [default: "."]
   --fullpath    include path in file name                                                                                                        [default: false]
   --prefix      prefix for image paths (css format only)                                                                                         [default: ""]
   --trim        removes transparent whitespaces around images                                                                                    [default: false]
   --square      texture should be s square                                                                                                       [default: false]
   --powerOfTwo  texture width and height should be power of two                                                                                  [default: false]
   --validate    check algorihtm returned data                                                                                                    [default: false]
   --algorithm   packing algorithm: growing-binpacking (default), binpacking (requires passing width and height options), vertical or horizontal  [default: "growing-binpacking"]
   --padding     padding between images in spritesheet                                                                                            [default: 0]
   --scale       percentage scale                                                                                                                 [default: "100%"]
   --fuzz        percentage fuzz factor (usually value of 1% is a good choice)                                                                    [default: ""]
   --extrude     extend the image border by the outer pixels                                                                                      [default: 0]

2. Node.js

   var spritesheet = require('spritesheet-js');
   
   spritesheet('assets/*.png', {format: 'json'}, function (err) {
     if (err) throw err;
   
     console.log('spritesheet successfully generated');
   });

###Trimming / Cropping###
Spritesheet.js can remove transparent whitespace around images. Thanks to that you can pack more assets into one spritesheet and it makes rendering a little bit faster.

*NOTE: Some libraries such as Easel.js dont't support this feature.*
![Trimming / Cropping](http://i.imgur.com/76OokJU.png)

###Installation###
1. Install [ImageMagick](http://www.imagemagick.org/)
2. ```npm install spritesheet-js -g```

###Test###

mocha test

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Thanks [Przemysław Piekarski](http://www.behance.net/piekarski) for logo design and assets in examples.